A gaggle of wealthy individuals, from Howard W. Buffett to Ron Cordes, swap stories about philanthropic efforts at a New York event organized by the Wealth & Giving Forum.

At an intimate event the other night at the Rubin Museum of Art in New York, a gaggle of wealthy individuals—ranging from Howard W. Buffett (Warren's grandson) to Ron Cordes (co-chairman of Genworth Financial Wealth Management)—sat down to sip wine and swap stories about their philanthropic efforts.

The evening was organized by the Wealth & Giving Forum, a small-scale peer-to-peer network that inspires wealthy folks to both give more and learn best practices from one another. The forum has been run since 2004 by Glen...